Rocks and the Rock Cycle — Cumulative exam

Question 35 • WCA 4130 Earth and Space Science 1st Quarter 26-27

Which is a difference between the Paleozoic and Mesozoic era?

Answer

Animals lived in the water during the Mesozoic and on land in the Paleozoic.

The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic.

Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic.

Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

Explanation

During the Paleozoic, animal life diversified and became more complex, with organisms moving from the oceans onto land. The Mesozoic is known for dinosaurs and the appearance of the first flowering plants, so choice D correctly describes a difference between the eras.

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